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compass plant

noun
1.
any of various plants having leaves that tend to lie in a plane at right angles to the strongest light, hence usually north and south, especially Silphium laciniatum.
Origin
1840-1850
1840-50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for compass-plant

compass plant

noun
1.
Also called rosinweed. a tall plant, Silphium laciniatum, of central North America, that has yellow flowers and lower leaves that tend to align themselves at right angles to the strongest light, esp in a north-south plane: family Asteraceae (composites)
2.
any of several similar plants
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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13
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